Important F5 Networks F5CAB1 Exam Questions

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F5 Networks BIG-IP Administration Install, Initial Configuration, and Upgrade F5CAB1 Exam

Attempt the F5 Certified Administrator, BIG-IP Certification practice test and solve real exam-like F5CAB1 questions to prepare efficiently and increase your chances of success. Our F5 Networks F5CAB1 practice questions match the actual BIG-IP Administration Install, Initial Configuration, and Upgrade exam format, helping you enhance confidence and improve performance. With our F5CAB1 practice exam software, you can analyze your performance, identify weak areas, and work on them effectively to boost your final F5 Certified Administrator, BIG-IP Certification exam score.

Vendor:	F5 Networks
Exam Name:	BIG-IP Administration Install, Initial Configuration, and Upgrade
Registration Code:	F5CAB1
Related Certification:	F5 Networks F5 Certified Administrator, BIG-IP Certification
Exam Audience:	F5 Network Administrators and System Engineers,

Total Questions

Last Updated

23-08-2026

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Question: 1

The BIG-IP Administrator uses Secure Copy Protocol (SCP) to upload a TMOS image to the /shared/images/ directory in preparation for an upgrade.

After the upload is complete, what will the system do before the image appears in the GUI under:

System Software Management Image List?

AThe system performs a reboot into the new partition

BThe system verifies the internal checksum

CThe system copies the image to /var/local/images/

Answer: B

Explanation:

When a TMOS ISO file is transferred to /shared/images/, the BIG-IP automatically performs a validation step:

Checksum Verification

Before the image becomes visible in the GUI, the system verifies the internal checksum embedded inside the ISO.

This ensures:

The file was fully transferred

The image is not corrupted

It matches the official F5 release signature

Only after passing this verification does the GUI display the ISO under ''Available Images.''

Why the other options are incorrect:

A . Reboot into a new partition

No reboot occurs simply from uploading an image.

C . Copying into /var/local/images/

This directory is not used for ISO storage.

All valid images remain in /shared/images/.

Thus, the correct system action is checksum verification.

Question: 2

modification]

An administrator is in the process of reactivating the license using the interface displayed in the exhibit.

What is the address of the license server to which the BIG-IP device must be able to establish an outbound connection in order to use the Automatic Activation Method?

Alicense.f5.com

Bcallhome.f5.com

Cask.f5.com

Dactivate.f5.com

Answer: D

Explanation:

When you choose Automatic as the activation method in the License Re-activate screen, the BIG-IP device itself contacts F5's license activation service over the Internet.

For successful automatic activation:

The BIG-IP must have outbound network connectivity (typically via the management interface).

DNS resolution and routing must allow it to reach the F5 license activation host (the one shown in option D).

The device sends its dossier and registration key to that service and receives an updated license file in return, which is then installed automatically.

The other hostnames in the options are not used by BIG-IP for license activation, so they cannot be correct in the context of Automatic Activation.

Question: 3

A BIG-IP Administrator is responsible for deploying a new software image on an F5 BIG-IP HA pair and has scheduled a one-hour maintenance window.

With a focus on minimizing service disruption, which of the following strategies is the most appropriate?

AUpdate the active node first, reboot to the newly updated boot location and verify functionality, then push the update from the active to the standby node and reboot the standby node.

BReset the Device Trust, apply the update to each node separately, reboot both nodes, then re-establish the Device Trust.

CUpdate the standby node first and reboot it to the newly updated boot location, failover to the newly updated node and verify functionality. Repeat the upgrade procedures on the next node, which is now in standby mode.

DUpdate both nodes in the HA pair, then reboot both nodes simultaneously to ensure they run the same software version.

Answer: C

Explanation:

For BIG-IP high-availability (HA) pairs, F5's recommended upgrade workflow prioritizes service continuity, predictable failover, and minimal downtime. The established best-practice sequence is:

Upgrade the standby unit first

Because the standby device is not passing traffic, upgrading and rebooting it does not impact production.

Boot the standby unit into the newly installed version

Once online, the administrator verifies basic health, device sync status, cluster communication, and module functionality.

Perform a controlled failover to the upgraded unit

Traffic shifts to the newly upgraded device, allowing validation of the configuration and operational behavior under real traffic loads.

Upgrade the second device (now standby)

The previously active device becomes standby after failover, allowing it to be safely upgraded and rebooted without interruption.

This phased approach ensures only one device is unavailable at a time, allowing continuous traffic flow throughout the upgrade process.

Why the Correct Answer is C

Option C exactly matches F5's documented production-safe upgrade method:

Upgrade the standby node first

Reboot into new image

Failover to upgraded device

Validate

Upgrade the remaining (now-standby) device

This procedure minimizes risk and traffic disruption.

Why the other options are incorrect:

A . Upgrade the active node first

Upgrading the active device requires removing it from service and failing over abruptly. This is not recommended and increases service disruption risk.

B . Resetting device trust

Resetting trust is unnecessary and can disrupt configuration sync, peer communication, and cluster operation. It is not part of any standard upgrade workflow.

D . Upgrading and rebooting both nodes simultaneously

This would cause total outage, because both HA members would be unavailable at the same time.

Question: 4

Which command will display the current active volume on a BIG-IP system?

Atmsh show sys version

Btmsh show sys software status

Ctmsh list sys software update

Answer: B

Explanation:

To identify which boot volume is currently active on a BIG-IP system, the correct command is:

tmsh show sys software status

This command displays:

All installed boot volumes (HD1.1, HD1.2, HD1.3, etc.)

The BIG-IP software version installed on each volume

The Active field, indicating which volume the system is currently booted from

The installation status (''complete'', ''in-progress'', ''allowed'')

This is the standard and authoritative way to determine the active boot location.

Why the other options are incorrect:

A . tmsh show sys version

Displays OS version, build, and date.

Does not show boot locations or which volume is active.

C . tmsh list sys software update

Shows software update configurations, not boot volume status.

Does not display which volume is active.

Question: 5

Refer to the exhibit.

Exam Question 5 Exhibit 1

An organization has purchased a BIG-IP license that includes all available modules but has chosen to provision only the modules they require. The exhibit displays the current resource allocation from the System Resource Provisioning page.

Based on the information provided, which F5 modules have been provisioned?

ALTM, APM

BDNS, APM

CLTM, DNS, APM

DTMM, DNS, APS

Answer: C

Explanation:

The exhibit shows the Current Resource Allocation for:

CPU

Disk

Memory

In particular, the Memory Allocation bar displays the modules that are currently provisioned.